Sicilian Vespers
The Sicilian Vespers (Italian: Vespri siciliani; Sicilian: Vespiri siciliani) is the name given to the successful rebellion on the island of Sicily that broke out on the Easter of 1282 against the rule of the French-born king Charles I, who had ruled the Kingdom of Sicily since 1266. Within six weeks, three thousand French men and women were slain by the rebels, and the government of King Charles lost control of the island. It was the beginning of the War of the Sicilian Vespers.
Background
The Papacy versus the House of Hohenstaufen
The rising had its origin in the struggle between the House of Hohenstaufen, which in the 13th century ruled Germany and claimed nominal authority over most of northern Italy, and the papacy, for control over Italy, especially the Church's private demesne known as the Papal States. The Papal States lay between Hohenstaufen lands in northern Italy and the Hohenstaufen Kingdom of Sicily in the south.
In 1245 Pope Innocent IV even declared the emperor Frederick II deposed and roused opposition to him in Germany and Italy. When Frederick died in 1250, his dominion was inherited by his son, Conrad. A period of turmoil followed Conrad's death in 1254, and control of the Kingdom of Sicily was seized by Manfred, Frederick's natural son, who reigned from 1258 to 1266.